One of the most important seismic vulnerability of precast structures is due to the lack of mechanical connection between structural elements. In this context the system of dissipative connection, Sismocell can be used for the seismic rehabilitation of precast structures designed without anti-seismic standards, in particular as a solution for the problem of the beam-column connection. The device guarantees a “dissipative fuse effect”, that makes the relative displacement beam-column be possible only at a controlled value of force.